Mercer Island, WA · King County
MERCER ISLAND CITY OF Water System
Current status
No open violations on record as of July 4, 2026.
This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Washington’s official records. Always confirm current status with Washington before making decisions based on this information.
System facts
- System ID (PWSID)
- WA5353640
- System type
- Community Water System
- Population served
- 31,057
- Service connections
- 9,807
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
Violation history
Monitoring, Routine Minor (TCR)
—Coliform (TCR)
December 1, 1992 – December 31, 1992
Archived
Archived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| December 1, 1992 – December 31, 1992 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Archived |
Archived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- December 31, 1992State Violation/Reminder Notice1 linked violation
- August 31, 1992State Violation/Reminder Notice1 linked violation
- January 31, 1992State Violation/Reminder Notice1 linked violation
Contact
MERCER ISLAND CITY OF
Phone not on record
Mercer Island, WA 98040